
Description: WEBrick is a lightweight HTTP server library that is bundled with Ruby. It enables developers to easily create HTTP servers in Ruby for testing, prototyping, and development.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Mongrel2 is an open-source web server written in C and designed for high performance and concurrency. It builds on ideas from Mongrel 1 and other servers, focusing on ease of configuration, stability, and modern features.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API